Voltage stabilization strategy of AC/DC distribution network in coal mine based on PV pre-stage Boost feedforward control
In the AC/DC distribution network of coal mines with distributed power sources such as photovoltaics,there are factors that cause DC voltage fluctuations,such as uneven illumination and load fluctuations.In order to reduce the influence of these fluctuations on system stability,we propose a control strategy that introduces the photovoltaic output voltage and motor load current as feed-forward links on the basis of the traditional single-loop control structure of photovoltaic system to attenuate DC link voltage fluctuations caused by these two factors.A simulation model of AC/DC hybrid distribution network in coal mines is built in PSCAD/EMTDC,and the effectiveness of the proposed control strategy is verified by comparing the maximum power point tracking(MPPT)control strategy,MPPT-traditional voltage regulation switching control strategy and the DC bus voltage characteristics under the proposed control strategy.
AC/DC distribution networkphotovoltaic systemsMPPTimproved regulation controlDC link voltage
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